Unaudited Condensed Consolidated Statements of Income (Loss) and Unaudited Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Total revenue	$ 455,178	$ 425,468	$ 827,667	$ 764,709
Home construction and land sales expenses	380,101	357,788	691,761	643,366
Inventory impairments and abandonments	0	282	0	282
Gross profit	75,077	67,398	135,906	121,061
Commissions	17,334	16,632	31,690	29,955
General and administrative expenses	40,852	40,100	78,137	76,488
Depreciation and amortization	3,066	3,155	5,573	5,832
Operating income	13,825	7,511	20,506	8,786
Equity in income of unconsolidated entities	256	33	155	55
Loss on extinguishment of debt	0	(15,563)	(25,904)	(15,563)
Other expense, net	(1,453)	(3,940)	(4,598)	(9,136)
(Loss) income before income taxes	12,628	(11,959)	(9,841)	(15,858)
Expense (benefit) from income taxes	1,012	(4,464)	109,118	(7,004)
Income (loss) from continuing operations	11,616	(7,495)	(118,959)	(8,854)
Loss from discontinued operations, net of tax	(58)	(40)	(430)	(110)
Net income (loss) and comprehensive income (loss)	$ 11,558	$ (7,535)	$ (119,389)	$ (8,964)
Weighted average number of shares:
Basic (in shares)	32,140	31,969	32,097	31,931
Diluted (in shares)	32,721	31,969	32,097	31,931
Basic earnings (loss) per share:
Continuing Operations (in dollars per share)	$ 0.36	$ (0.23)	$ (3.71)	$ (0.27)
Discontinued Operations (in dollars per share)	0.00	0.00	(0.01)	0.00
Total (in dollars per shares)	0.36	(0.23)	(3.72)	(0.27)
Diluted income (loss) per share:
Continuing operations (in dollars per share)	0.36	(0.23)	(3.71)	(0.27)
Discontinued operations (in dollars per share)	(0.01)	0.00	(0.01)	0.00
Total (in dollar per share)	$ 0.35	$ (0.23)	$ (3.72)	$ (0.27)